Elevator control apparatus

ABSTRACT

An elevator control apparatus which operates a plurality of elevators so as to serve a plurality of landing floors evenly, wherein the imaginary position of each elevator is determined in accordance with the space between each elevator and the succeeding one, a service zone of each elevator being established between the imaginary positions of each elevator and the preceeding one, and the elevator being stopped when a call is produced within the service zone.

United States Patent 1W1 Iwasaka et al.

Apr. 24, 1973 ELEVATOR CONTROL APPARATUS Inventors: Tatsuo lwasaka.3174-14, Nakanc; Hid eto Matsuzawa, 404-3, lchige; Takeo Yuminaka, 5-13,lshikawa; Akinori Watanabe; lsao lnuzuka, both of 663 lchige, all ofKatsuta, Japan Filed: July 6, 1971 Appl. No.: 159,781

us. c1. .....187/29 R Int. Cl. ..B66b 1/18 Field of Search 187/29 [56]References Cited UNITED STATES PATENTS 3,51 1,343 5/1970 De Lamater..187/29 3,379,284 4/1968 Yeasting ..I87/29 Primary Examincr-Bcrnard A.Gilheany As.s-istantExaminer-W. E. Duncanson, Jr. Attorney-Craig,Antonelli & Hill [5 7] ABSTRACT v An elevator control apparatus whichoperates a plurality of elevators so as to serve a plurality of landingfloors evenly, wherein the imaginary position'of each elevator isdetermined in accordance with the space between each elevator and thesucceeding one, a service zone of each elevator being establishedbetween the imaginary positions of each elevator and the preceeding one,and the elevator being stopped when a call is produced within theservice zone.

9 Claims, 12 Drawing Figures fb fc I l mA' {DISA I PssA T POSITIONADVANCING DEVICE DECIDING 7 NA DEVICE INF ORMING DEVICE 1 I CCB ccc SSA.

POSITION B- SPACE DECIDING DEVICE FC' DETECTOR:

Patented April 24, 1973 3,729,066

I 9 Shee cs-Sheet 1 FIG. I

fb fc {GA & hMA {DISA POSITION ADVANCING DECIDING NA INFORMING FA DEVICEHC- DEVICE DEVICE PSSA' CCB ccc DA EA f gggg SSA DECIDING Fc- DETECTORK- DEVIICE INVENTORS.

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ATTORNEYS I Patnted April 24, 1973 9 Sheets-Sheet 4 fi m o .5 5 A .2 m Aw, :m m 3 Q 3% w 1 A A A M A A A |1|A mm m INVEN'IOKS TAT5UO IWASAKA I Hwere MATSUZAWA ,musa vvmnAM',

BY AKmomwArANwEa-d ISAOINUZUM ATTORNEYS Patented A ril 24, 1973 FLOORS 9Sheets-Sheet 9 FIG. 70, FIG. 7c

FIG. 7b

' v 'V V 9 A 9 84 v- I A V A 7A v A v 7A v- 6 V A V 6 V 5 v A v' v 5 A v4A v v 4A v 3 V A V 3 A V A g A. A A A" A B C A B C A B Cv ELEVATQRSELEVATORS ELEVATORS A IUPWARD INDICATION v IDOWNWARD INDICATIONINVENTORS TA uo IWA AKA HIDETO MATSUZAWAITAKEO YIIMINAKA,

' BY AKINORI WAT AME In-LISA!) INUZUKA awamma; my

ATTORNEYS ELEVATOR CONTROL APPARATUS BACKGROUND OF THE INVENTION Thisinvention relates to an elevator control apparatus whichoperates aplurality of elevators so as to serve a plurality of landing floorsevenly.

described.

SUMMARY OF THE INVENTION Accordingly, it is an object of this inventionto provide a new control apparatus which controls the opera- I tion of aplurality of elevators so as to serve the various floors with adequatespacing from each other.

According to one aspect of an embodiment of this invention, the controlapparatus includes means for determining a service zone foreachelevator, the service zone being shifted according to the condition ofoperation of the elevators.

Other detailed objects and aspects of this invention will becomeapparent upon reading the specification and inspection of the drawingsand will be particularly pointed out in the claims.

DESCRIPTION OF THE DRAWINGS A FIG. l'is a block diagram of an embodimentaccording to this invention;

FIG. 2 shows a detailed circuit of a position space deing part of thedeciding device MA in FIG. 1;

F 6 shows a detailed circuit of the informing device DISA in FIG. 1; and

FIGS. 7a to 7c show service indications of the elevators according tothe different embodiments of this in- Y vention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS FIG. 1 isa block diagramof an embodiment according to this invention. Hereinafter, theexplanation will relate to three elevators A, B and C which are operatedbetween the first floor and the tenth floor. The block diagram in FIG. 1shows only an apparatus for controlling the elevator A. The sameapparatus is also pro-' vided to control the elevators B and C,respectively. It

is,'of course, within, the ordinary application of applicants inventionto be able to change the number of elevators employed and the number offloors serviced.

. Referringto FIG. 1', a position space detector DA detects thespace-between the elevator A and the nearest succeeding elevator theretoby comparing a signal FA with signals PB and FC. The signals FA, FB andFC represent the positions of the elevators A, B and C, respectively,and the position signal normallycorresponds to the floor the elevator isstopping at. However, when the elevator is running, the position signalcorresponds to the nearest floor that the elevator is able to stop at.If the elevator, during an upward operation, passes the fourth floor,the position signal corresponds to the fifth floor in the low speed ofthe elevator, to the sixth floor in the middle speed, and to the seventhfloor in the high speed because the elevators require a certaindeceleration distance according to the speed in order to stopcomfortably. An output signal of the detector DA, that is, a spacesignal SSA, is applied to a position space deciding device EA, whereinthe space signal SSA is represented by the number of floors. The signalSSA is compared with a reference signal K in the deciding device EA. Thereference signal K, which designates the appropriate space between thetwo elevators by the number of floors, is determined as follows:

In case of a normal demand condition, it is desired that all elevatorsbe distributed evenly with respect to all of the floors. Therefore, theappropriate space F S is where f is the number of floors served by theelevators and n is the total number of elevators employed. For example,if f=l0 and n=3 as described in the aforementioned example, FS becomessix floors. Namely, if the elevator A capable of responding to theupward call is at the second floor, the elevator B is at the eighthfloor in the upward operation and the elevator C is at the sixth floorin the downward operation. Further, the appropriate space FS should bechanged by demand conditions of the elevator, such as the number ofpassengers in the cage of each elevator, distribution of thedestinations required by the passengers, the number of the hall callsand so on.

The deciding device EA produces an output signal in accordance with thedifference between the reference signal K and the space signal SSA. Theoutput signal of the signal SSA becomes smaller than the referencesignal K, the signal PSSA is produced and the imaginary position signalfa is advanced thereby. The imaginary position signal represents thenearest floor that the elevator is capable of serving in response tohall calls. Although the elevator can 'decelerate and stop in responseto a hall call produced on a certain floor, if I the flooris behind thefloor designated by the imaginary position signal, the elevator does notserve the called floor.

The imaginary signal fa is applied to a device MA for deciding whetherthe elevator A can serve the called floor, and it is also applied to thecorresponding devices MB and MC (not shown) for the elevators B and C.The device MA detects thepresence of various signals ahead of the floordesignated by the imaginary position signal fa. The first ones of thevarious signals are imaginary position signals fl) and fc of theelevators B and C. A service zone of the elevator A, therefore, islimited to the floors between the signal fa and either of the signalsfla or fc. The details will be explained later. The second ones are cagecall signals CCB'and CCC, which are produced by request of passengers inthe elevators B and C. The floors corresponding to these signals CCB andCCC are excepted from the service zone of the elevator A. The third oneis a hall call signal HC which is produced by request of waitingpassengers in the elevator hall of each floor. If there is the signal HCin the service zone, a stopping instruction is given to the elevator A.The last one is a cage call signal CCA of the elevator A itself, whichis given priority to other signals. When the cage call signal CCA isproduced, the stopping instruction is given to the elevator Airrespective of the service zone. As mentioned above, the output NA ofthe device MA becomes the stopping instruction, and simultaneously it isapplied to an informing device DISA to turn on indicating lamps.

The detailed circuits of each device described above and theiroperations will be explained hereinafter, referring to the accompanyingdrawings.

FIG. 2 shows an example of a detailed circuit of the position spacedetector DA in FIG. 1. In this figure, F lUA to F9UA are positionsignals during the upward operation of the elevator A, and F2DA to FDAare position signals during the downward operation of the elevator A.Similarly, F lUB to F9UB and F2DB to FIODB, and FIUC to F9UC and F2DC toF10DC are position signals of the elevators B and C, respectively. Thesesignals are generated in accordance with the operation of each elevatorby known apparatuses and control means (not shown). Each signal isutilized as followsi For example, the signal FZUA is applied to an IN-HIBIT gate I2UA through an OR gate 02UA1. On the other hand, the signalF2UB or F 2UC is supplied to an IlUA through an OR gate OlUAl. The gateO2UA1 also receives an output of an INHIBIT gate I3UA (not shown). Thesame circuits are constructed for each floor, and the output of theINHIBIT gate for a certain floor is applied to an input terminal of theINHIBIT gate for the just previous floor in a running direction throughthe OR gatev Therefore, an output of the IN- HIBIT gate I9DA in thebottom of the drawing is applied to an OR gate O10DA1 in the top of thedrawing to construct the circular circuit by means of the IN- HIBITgates and the OR gates.

If the elevator A is at the eighth floor and the elevator B is at thesecond floor, signals F8UA and F2UB are present. The signal F8UA is fedto the INHIBIT gate I8UA through an OR gate 08UA1. The output of thegate I8UA is applied to a resistor r8UA. Succeedingly, an INHIBIT gateI7UA (not shown) is turned on by the output of the gate I8 UA and anoutput of the gate I7UA is applied to a resistor r7UA (not shown). Thisis repeated through to an INHIBIT gate I3UA and a resistor r3UA (bothnot shown). Although an output of the gate I3UA is fed to an inputterminal of the gate I2UA through the gate O2UA1, the gate I2UA does notproduce the output since the signal F2UB is applied to an inhibitterminal of the gate I2UA through the gate O2UA2. As a whole, theoutputs of each INHIBIT gate, that is output voltages, are applied tosix resistors r8UA to r3UA. The voltage across a resistor rA isproportional to 6r,,/ r, where r is the individual resistance value theresistance value of rA.

Generally speaking, if the number of INHIBIT gates producing the outputis k, the voltage across the resistor rA is proportional to kr /r. Thisbecomes the signal SSA. As described above, the circuit shown by FIG. 2is the circuit for obtaining the space between the elevator A and thenearest succeeding elevator thereto The obtained space signal SSA isapplied to the position space deciding device EA to be compared with thereference signals. FIG. 3 shows an example of the detailed circuit ofthe position space deciding device EA in FIG. 1.

In this figure, an adder ADDA consists of a plurality of input resistorsRI to R4A, a capacitor CA and a feedback resistor RFA, and anoperational amplifier OPA. The signal SSA is applied to the resistorRIA. The other resistors R2A to R4A receive signals such as the I numberof passengers in a cage of the elevator A (C- WA), the time forreciprocating operation of the elevator between the first floor and thetenth floor (RTT), and the number of hall calls (NOHC). The output ofthe adder ADDA is as follows: I

where r to r and r are resistance values of the resistors RIA to R4A andRFA, respectively. For simplification, the resistors R2A to R4A areregarded as having values close to infinity in the followingexplanation. The output of the adder ADDA, therefore, is proportional toonly the signal SSA. R1 1A to R14A are resistors for providing referencevoltages V, to V fThe I value of the reference voltages V to Vcorrespond to five to two floor differences respectively. Thesereferences V to V, are compared with the output of the adder ADDA inrespective comparators CMlA to CM4A. Each comparator produces an outputwhen the output of the adder ADDA becomes smaller than the respectivereference thereof. If the signal SSA corresponds to a two floordifference, all comparators CMlA to CM4A produce outputs. The output ofthe comparator CM4A is applied to an inhibit terminal of an INHIBIT gateICM3A. The output of a comparator CM3A is inhibited thereby. Also, theoutput of the comparator CM4A or CM3A is applied to an inhibit terminalof an INHIBIT gate ICM2A through an OR gate OCM3A. An output of acomparator CM2A is inhibited thereby. An output of a comparator CMIA andan input of an INHIBIT gate ICMOA are inhibited similarly. Inconsequence, only the output of the comparator CM4A is present as aposition advancing signal PSSA, which is a four floors advancing signalE4A. Further, if the signal SSA corresponds to a four floor difference,the comparators CMlA and CM2A produce outputs, whereas the comparatorsCM3A and CM4A do not produce outputs-The output of the comparator CMlAis inhibited by the gate ICMIA, and the signal EIA is not produced. Thesignal EOA is inhibited since an output of the comparator CM2A isapplied to an inhibit terminal of the gate ICMOA through an OR gateOCMlA. Therefore, only the signal E2A is present, and it becomes a twofloors advancing signal.

The remaining signals EOA, EIA and BSA are also produced in the sameway, which designate zero floor, Ofne floor and three floors advancingsignals, respectively. Further, the signal EOA means that the imaginaryposition signal fa coincides with the position signal FA. The positionadvancing device GA which receives the position advancing signals toproduce the imaginary position signals, is shown in FIG. 4. This figureshows only a device which produces the imaginary position signalsbetween the first floor and the tenth floor in the upward direction. Agroup of circuits for each floor consists of five AND gates and an ORgate. For the ninth floor, for example, the position signals F9UA toFSUA are applied to the AND gates A9UAI to A9UA5, respectively. Theposition advancing signals EOA to E4A are also applied to the gatesA9UA1 to A9UA5, respectively, as one more input of each AND gate. Anoutput through an OR gate Of9Ua becomes the imaginary position signalj9Ua. For the eighth floor, the position signals F8UA to F4UA and theposition advancing signals EOA to E4A are applied to a group of ANDgates A8UA1 to A8UA5 in the same manner as the ninth floor. An outputthrough an OR gate OjBUa becomes the imaginary position signal f8Ua.

In this manner, the position signals which are given to the AND gatesare shifted by one signal every floor. For that reason, a positionsignal F2DA in the downward operation is first used in a group ofcircuits for an imaginary position signal f4Ua (notshown), and positionsignals F2DA to FSDA in the downward operation are applied to four ANDgates AIUAZ to AlUAS of the last group, respectively. If the positionsignal is FSUA and the position advancing signal is E4A, the AND gateA9UA5 produces the output. The output through the OR gate Oj9Ua becomesthe imaginary position signal f9Ua. If the position signal is F8UA andthe position advancing signal is EOA, the AND gate A8UA1 produces theoutput which becomes the imaginary position signal fBUa. In the latterexample, the position signal coincides with the imaginary positionsignal.

The following explanation will relate to the service zone of theelevator A which is determined by applying these imaginary positionsignals and others.

FIGS. 5a and 5d show examples of the detailed circuit of the device MAin FIG. 1. The former two of these figures show the different examplesof the circuit for deciding the service zone of the elevator A. In FIG.5a, for example, a circuit for the second floor consists of two OR gatesOjZUaI and OfZUaZ and an INHIBIT gate I2Ual. One of two inputs of thegate OjZUal is the imaginary position signal fiUa of the elevator A, andits output is applied to the gate I2Ual. The two inputs of the gateOfiUaZ are the imaginary position signals jZUb of the elevator B andf2Uc of the elevator C.'An output of the gate OfZUaZ is fed to aninhibit terminal of the gate I2Ual. An output of the gate I2Ua1 becomesa signal representing the floor capable of being served by the elevatorA, and simultaneously it is fed to an OR gate OfBUal (not shown )'forthe third floor. One more input of the gate OfZUal is an output of theINHIBIT gate IlUal for the first floor. In this manner, an output ofeach INHIBIT gate is applied to the OR gate of the advanced floor by onein a direction of operation, therefore, an output of the INHIBIT gateI10Da1 in the top of the drawing is fed to an OR gate Oj9Da1 at thebottom of the drawing. The circular circuit is constructed by analternate arrangement of the INHIBIT gates and the OR gates. FIG. 5bshows another circuit for deciding the service zone of the elevator A.The only difference between FIGS. 5a and 5b is in the inputs of thegates OflUa2 to Of9Ua2 and Of2Da2 to OfIODa2. A functional differencecaused by the above difference will be explained later.

The operation of the device above-described is as' follows. It isassumed thatthe imaginary position of the elevators A, B and C are thesecond floor in the upward, the fifth floor in the downward, and theninth floor in the upward, respectively. Thus, the signals j2Ua, fSDband f9Uc are generated in the above case. The signal f2Ua is applied tothe gate I2Ual through the gate Oj2Ual. The gate I2Ua 1 produces itsoutput since there is no inhibit signal from the gate OjZUa Z. Theoutput of the gate I2Ua1 is applied to the INHIBIT gate I3Ual through anOR gate Of3Ual. The gate I3Ual produces its output thereby. This isrepeated up to the INHIBIT gate I8Ua1. An output of the gate I8Ual isapplied to the INHIBIT gate I9Ual through an OR gate Oj9Ual; however,since the signal j9Uc is applied to the inhibit terminal of the gateI9Ual through an OR gate Of9Ua2, the gate I9Ua1 does not produce itsoutput. Accordingly, the outputs of the gates I2Ua1 to I8Ual appear onterminals 2u to Bu, respectively. These outputs represent the servicezone in which the v elevator A is able to serve in response to hallcalls produced therewithin. If the other elevator B or C is able toserve a certain floor in the service zone, the floor may be exceptedfrom the service zone of the elevator A. Details of this control will beexplained later by referring to FIG. 5c or 5d.

If the elevators B and C do not serve any floors in the service zone ofthe elevator A, namely, there are no cage calls of the elevators B and Ctherewithin, the informing device DISA indicates that the elevator A isable to respond to upward hall calls between the second floor and theeighth floor. The same devices are shown in FIG. 5a decide service zonesof the elevators B and C. The whole indication of the informing deviceDISA is as shown in FIG. 7a. It is clear from FIG. 7a that the deviceshown by FIG. 5a does not make the service zone of each elevatoroverlap. In the device shown by FIG. 5b, the inhibit inputs of eachINHIBIT gate are different from that in FIG; 5a. For example, the inputsof the gate OfiUaZ in FIG. 5a are f2Ub and f2Uc, whereas that of thegate OjZUaZ in FIG. 5b are fl Ub and f1 Uc. In the operation of thecircuit shown in FIG. 5b, it is not different from the case of FIG. 5ain that the gate I2Ua1 produces its output. But, since the signal flUcis so arranged as to be fed to an inhibit terminal of the gate I10Dalthrough an OR gate Ofl0Da2, the gate I10Da1 does not produce its output.The gate I9Ual produces its output. The device in FIG. 5b is differentfrom the device in FIG. 5a in this point. Accordingly, the device inFIG. 5b can made the service zone of each elevator overlap by one floor,as shown in FIG. 7b.

floor is within the service zone of the elevator A, the signal appearson the terminal 10d. At this time, if a cage call of the elevator B or Cis not registered, the signal on the terminal 10d is fed to a relayR10DA through the INHIBIT gate I10Da2 and an OR gate 'Ofl0Da4. The relayRIODA is excited to close its contact. The relay R10DA is an indicatingrelay in the informing device DlSA and its contact is connected inseries with an indicating lamp. A circuit of the informing device DlSAis shown in FIG. 6. The contact RlODal of the relay R10DA is closed andthe lamp L10DA is turned on by the electric source e Similarly, in FIG.6, RlUa-l to R9Ua-l and R2Da-l to R9Da-l are contacts of the relay RlUAto R9UA and RZDA to R9DA in FIG. 50, respectively. Lamps LIUA to L9UAand L2DA to L10DA connected to these contacts in series are provided forthe respective floors. For instance, the lamps LZUA and L2DA areprovided for the second floor. When the lamp L2UA is turned on, thisindicates that the elevator A is able to respond to the upward hall callproduced in the second floor, and when the lamp L2D is turned on, thisindicates that the elevator A is able to respond to the downward hallcall produced on the second floor. The same is true of the indication bythe other lamps. The turn-on of the lamp L10DA indicates that theelevator A is able to respond to the downward operation. In such acondition, if the hall call HC10D in the tenth floor is produced, theAND gate A10D7A in FIG. 50 produces an output in response to both theoutput of the gate I10Da2 and the hall call HC 10D. A memory circuitMlODa memorizes the output of the gate A10D7A. An output of the circuitM10Da is applied to another control means (not shown) as the stoppinginstruction N10DA. Receiving the instruction NlDA, the other controlmeans operates to stop the elevator A at the th floor. Theabove-described other control means is a known speed control means. Whenthe elevator A stops, a signal SDlOUa is produced to reset the circuitM10Da. Further, in this circuit, a cage call C10Da produced in theelevator A has a priority. When the cage call C10Da is present, theinstruction NIODA is produced. Although the lOth floor is without theservice zone of the elevator A and the hall call HClOD is not present.

If the other elevator B or C is due to stop at the 10th floor inresponse to the respective registered cage call, the cage call C10Db orC10Dc is fed to an OR gate Ofl0Da3 to inhibit the output of the gateI10Da2. In this case, although the hall call I-IC10D is present, thestopping instruction N10Da is not given to the elevator A. The elevatorA need not stop at the 10th floor, since the elevator B or C servesthese floors, and the floors served by the other elevator are exceptedfrom the service zone of the elevator A. An example of the indication inthis case isshown in FIG. 7c. The service zone of the elevatorA in FIG.70 is between the second floor and the tenth one, and the ninth oneserved by the elevator C is excepted from the service zone of theelevator A.

- ture and the operation of one typical device. If the 10th If therelation to the other elevator B or C need not be considered, thedevices 8 can be simplified as shown in FIG. 5d. The operation of thesedevices is similar to that of FIG. 5:: in greater part. When the signalHC10D is produced, the gate A10D7A produces its output on condition thatthe signal on 1011 is present. The circuit M10Da memorizes the output ofthe gate A10D7A to produce the stopping instruction N 10DA. The relayR10DA is excited to produce the indication. When the elevator A isstopped in response to the instruction N10DA, the signal SDl0Ua isproduced to reset the circuit M10Da.

Having thus described this inventiorr, it is obvious that variousmodifications within the knowledge of workers in the art may be utilizedwithout departing therefrom.

It is to be understood also that although the invention has beendescribed with specific reference to a particular embodiment thereof, itis not to be so limited, since changes and alterations therein may bemade which are within the full intended scope of this invention asdefined by the appended claims.

We claim:

1. In an elevator control apparatus for operating a plurality ofelevators so as to serve a plurality of landing floors evenly, theimprovement comprising first means for generating an imaginary positionsignal of an elevator which is advanced of the actual position of theelevator, second means for establishing a service zone of an elevator byutilizing the imaginary position signals of the elevator and anotherelevator in which zone the elevator isable to serve in response to hallcalls, and third means for altering the imaginary position signal so asto shift the service zone according to conditions of the operation ofthe elevators.

2. An elevator control apparatus as claimed in claim 1, wherein saidthird meansincludes means for changing said imaginary position signal ofthe elevator according to the space between each elevator and the justsucceeding elevator.

3. An elevator control apparatus as claimed in claim 1, wherein saidthird means includes means for changing said imaginary position signalof the elevator according to the number of passengers in a cage of theelevator.

4. An elevator control apparatus as claimed in claim 1, wherein saidthird means includes means for changing said imaginary position signalof the elevator according to the number of hall calls.

5. An elevator control apparatus as claimed in claim 1, wherein saidsecond means includes means for causing said service zones of saidelevators to partially overlap each other.

6. An elevator control apparatus as claimed in claim 1, wherein saidsecond means includes means for excepting floors served by otherelevators from said service zone of the given elevator.

7. An elevator control apparatus as claimed in claim 1, furthercomprising means for actuating the elevator having a service zoneincluding a produced hall call to respond to the hall call.

8. An elevator control apparatus as claimed in claim 1, furthercomprising means for producing a stopping instruction only when a hallcall is produced within the service zone.

9. An elevator control apparatus as claimed in claim 1, furthercomprising means for indicating an elevator capable of responding to ahall call in a landing floor when the hall call is produced at thelanding floor.

* 4: :u it 5

1. In an elevator control apparatus for operating a plurality ofelevators so as to serve a plurality of landing floors evenly, theimprovement comprising first means for generating an imaginary positionsignal of an elevator which is advAnced of the actual position of theelevator, second means for establishing a service zone of an elevator byutilizing the imaginary position signals of the elevator and anotherelevator in which zone the elevator is able to serve in response to hallcalls, and third means for altering the imaginary position signal so asto shift the service zone according to conditions of the operation ofthe elevators.
 2. An elevator control apparatus as claimed in claim 1,wherein said third means includes means for changing said imaginaryposition signal of the elevator according to the space between eachelevator and the just succeeding elevator.
 3. An elevator controlapparatus as claimed in claim 1, wherein said third means includes meansfor changing said imaginary position signal of the elevator according tothe number of passengers in a cage of the elevator.
 4. An elevatorcontrol apparatus as claimed in claim 1, wherein said third meansincludes means for changing said imaginary position signal of theelevator according to the number of hall calls.
 5. An elevator controlapparatus as claimed in claim 1, wherein said second means includesmeans for causing said service zones of said elevators to partiallyoverlap each other.
 6. An elevator control apparatus as claimed in claim1, wherein said second means includes means for excepting floors servedby other elevators from said service zone of the given elevator.
 7. Anelevator control apparatus as claimed in claim 1, further comprisingmeans for actuating the elevator having a service zone including aproduced hall call to respond to the hall call.
 8. An elevator controlapparatus as claimed in claim 1, further comprising means for producinga stopping instruction only when a hall call is produced within theservice zone.
 9. An elevator control apparatus as claimed in claim 1,further comprising means for indicating an elevator capable ofresponding to a hall call in a landing floor when the hall call isproduced at the landing floor.